Abstract
The test of traces prints, or sometimes called as “tests for colour” lie in examining the area where the teeth touch the gearing at a specific load. The mutual prints, which are reached under given corrections of the gearing, are simulated by a practical test. It is the simplest way of practically evaluating the correct grip of cogwheels. This process is used for analysing the problematic gear. Based on the results of this test, it is possible to establish the area of interest for new corrections of gearing which can help to reduce the noise level, improve the grip conditions or durability on the given gearing.
Highlights
The tested gear must be degreased and it is first mounted into special housing which has cut holes
The issue of the indicated noise level is related to 18 Nm, which means the results of traces are from 20 Nm
The results clearly show that – with increasing speed – the amplitude of the first harmonic frequency increases on a linear basis
Summary
The tested gear must be degreased and it is first mounted into special housing which has cut holes. When the values are higher, the trace does not change significantly Mirror supporting colour has a smaller bearing area than full supporting colour It usually develops when the load is low (smaller elastic deformations) in normal traffic by reason of barrel gearing ( a ). In this case, the bearing area is situated in the gearing edges. Conical supporting colour is formed especially because of a badly fixed workpiece in the machine or by a large deformation of a cogwheel. Possible causes: eccentric hole, heat deformations, badly fixed workpiece in the machine. It is demonstrated by a fluctuating character of vibrations
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